Les adresses IP débutant par 121.103.5 sont fournies par So-net Entertainment Corporation, elles appartiennent au CIDR (Classless Inter-Domain Routing) 121.103.0.0/16, le bloc IP comprant les adresses de 121.103.0.0 à 121.103.255.255). Le numéro de système autonome (ASN) est 2527.
| ASN | 2527 |
| IP commençant par | 121.103.0.0 |
| IP se terminant par | 121.103.255.255 |
| Nom ASN | So-net Entertainment Corporation |
| CDIR | 121.103.0.0/16 |
| IP numérique | |
| Registe | apnic |
| Dernière mise à jour | 05/08/2017 |

| Code pays | Pays | Région | Ville | Latitude | Longitude | Dernière mise à jour | |
| IP2Location | JP | Japon | - | Hamamatsu | 34,7108 | 137,7261 | 2017-08-05 |
| MaxMind | JP | Japon | - | Tokyo | 35,6427 | 139,7677 | 2017-08-05 |
| Whois | JP | - | - | - | 138 | 36 | |
| W3C | - | - | - | - | - | - | - |
| IP | Numerical IP | DNS |
| 121.103.5.0 | 2036794624 | 0 |
| 121.103.5.1 | 2036794625 | 0 |
| 121.103.5.2 | 2036794626 | 0 |
| 121.103.5.3 | 2036794627 | 0 |
| 121.103.5.4 | 2036794628 | 0 |
| 121.103.5.5 | 2036794629 | 0 |
| 121.103.5.6 | 2036794630 | 0 |
| 121.103.5.7 | 2036794631 | 0 |
| 121.103.5.8 | 2036794632 | 0 |
| 121.103.5.9 | 2036794633 | 0 |
| 121.103.5.10 | 2036794634 | 0 |
| 121.103.5.11 | 2036794635 | 0 |
| 121.103.5.12 | 2036794636 | 0 |
| 121.103.5.13 | 2036794637 | 0 |
| 121.103.5.14 | 2036794638 | 0 |
| 121.103.5.15 | 2036794639 | 0 |
| 121.103.5.16 | 2036794640 | 0 |
| 121.103.5.17 | 2036794641 | 0 |
| 121.103.5.18 | 2036794642 | 0 |
| 121.103.5.19 | 2036794643 | 0 |
| 121.103.5.20 | 2036794644 | 0 |
| 121.103.5.21 | 2036794645 | 0 |
| 121.103.5.22 | 2036794646 | 0 |
| 121.103.5.23 | 2036794647 | 0 |
| 121.103.5.24 | 2036794648 | 0 |
| 121.103.5.25 | 2036794649 | 0 |
| 121.103.5.26 | 2036794650 | 0 |
| 121.103.5.27 | 2036794651 | 0 |
| 121.103.5.28 | 2036794652 | 0 |
| 121.103.5.29 | 2036794653 | 0 |
| 121.103.5.30 | 2036794654 | 0 |
| 121.103.5.31 | 2036794655 | 0 |
| 121.103.5.32 | 2036794656 | 0 |
| 121.103.5.33 | 2036794657 | 0 |
| 121.103.5.34 | 2036794658 | 0 |
| 121.103.5.35 | 2036794659 | 0 |
| 121.103.5.36 | 2036794660 | 0 |
| 121.103.5.37 | 2036794661 | 0 |
| 121.103.5.38 | 2036794662 | 0 |
| 121.103.5.39 | 2036794663 | 0 |
| 121.103.5.40 | 2036794664 | 0 |
| 121.103.5.41 | 2036794665 | 0 |
| 121.103.5.42 | 2036794666 | 0 |
| 121.103.5.43 | 2036794667 | 0 |
| 121.103.5.44 | 2036794668 | 0 |
| 121.103.5.45 | 2036794669 | 0 |
| 121.103.5.46 | 2036794670 | 0 |
| 121.103.5.47 | 2036794671 | 0 |
| 121.103.5.48 | 2036794672 | 0 |
| 121.103.5.49 | 2036794673 | 0 |
| 121.103.5.50 | 2036794674 | 0 |
| 121.103.5.51 | 2036794675 | 0 |
| 121.103.5.52 | 2036794676 | 0 |
| 121.103.5.53 | 2036794677 | 0 |
| 121.103.5.54 | 2036794678 | 0 |
| 121.103.5.55 | 2036794679 | 0 |
| 121.103.5.56 | 2036794680 | 0 |
| 121.103.5.57 | 2036794681 | 0 |
| 121.103.5.58 | 2036794682 | 0 |
| 121.103.5.59 | 2036794683 | 0 |
| 121.103.5.60 | 2036794684 | 0 |
| 121.103.5.61 | 2036794685 | 0 |
| 121.103.5.62 | 2036794686 | 0 |
| 121.103.5.63 | 2036794687 | 0 |
| 121.103.5.64 | 2036794688 | 0 |
| 121.103.5.65 | 2036794689 | 0 |
| 121.103.5.66 | 2036794690 | 0 |
| 121.103.5.67 | 2036794691 | 0 |
| 121.103.5.68 | 2036794692 | 0 |
| 121.103.5.69 | 2036794693 | 0 |
| 121.103.5.70 | 2036794694 | 0 |
| 121.103.5.71 | 2036794695 | 0 |
| 121.103.5.72 | 2036794696 | 0 |
| 121.103.5.73 | 2036794697 | 0 |
| 121.103.5.74 | 2036794698 | 0 |
| 121.103.5.75 | 2036794699 | 0 |
| 121.103.5.76 | 2036794700 | 0 |
| 121.103.5.77 | 2036794701 | 0 |
| 121.103.5.78 | 2036794702 | 0 |
| 121.103.5.79 | 2036794703 | 0 |
| 121.103.5.80 | 2036794704 | 0 |
| 121.103.5.81 | 2036794705 | 0 |
| 121.103.5.82 | 2036794706 | 0 |
| 121.103.5.83 | 2036794707 | 0 |
| 121.103.5.84 | 2036794708 | 0 |
| 121.103.5.85 | 2036794709 | 0 |